Speed-indicator for talking-machines.



H. KOCOUREK.

SPEED INDICATOR FOR TALKING MACHINES. APPL'IcATloN FILED 1AN.2. 1915.

1,21951 12. Patented Mar. .13, 1917.

HENRY KOCOUREK, OF CHICAGO, ILLINOIS, ASSIGNOR TO STEWART-:WARNER SPEEDOMETER CORPORATION, VIRGINIA.

OF CHICAGO, ILLINOIS, A CORPORATION OF SPED-INDICATOR FOR TALKING-MACHIN ES.

Applicationiled January 2, 1915. Serial No. 2.11.

Illinois, have invented certain new and useful Improvements in Speed-Indicators for Talking-Machines, of which the following is a specification, reference being had to the accompanying drawings, formlng a part thereof. y

This invention relates to asubstantially designed speed indicator' Afor showing the speed of operation of a phonograph. It conssts'of the features and elements described and shown in the drawings, as indicated by the claims.

In the drawings: i

Figure 1 i's a top plan view of a talking machine or phonograph showing a speed indicator embodying this invention applied thereto.

Fig.y 2 is an enlarged detail section of the speedometer taken as'indicated at line, 2 2, on Fig. 1.

Fig. 8 is a detail section taken as indicated at line, 3-3, on Fig. 2.

The talking machine illustrated in the drawings is the type in which a record disk,

A, is carried upon a revolving table, B, usually driven by a spring motor whose winding crank is indicated at C. The speed of the motor is controlled usually by some form of centrifugal governor, not shown, and is rendered variable through a limited range by adjustment of such governor, the adjusting means being indicated as a combined handle and pointer, D, traversing a short scale, E. The mechanism of the particular machine illustrated is carried in a metal frame having an annular portion, F, which is circular in outline except for an extension, G, in which is carried the hollow arm, H, whichsupports the reproducing stylus, J, and its allied mechanism, and communicates with the sound amplifying chamber below the revolving table, B.

A: is well understood, even a slight variation in the speed of revolution of the table, B, will cause a change of pitch in the sounds ,as reproduced by the instru1nent',"and it is .,duce the most pleasing results. The speed indicator, 1, which is designed to serve this purpose 1s shown as the magnetic type comprlsing a ring magnet, Q, mounted on a non- ASpecification of Letters Patent. Ptelllted DIEU'. 13, 1917.

magnetic core, 3, which is carried upon a rotatable shaft, 4, provided with a wheel, 5, whose rim carries a rubber tire, (3, for frictional engagement with the periphery, B1, of the table, B. The magnet, 9., may be reduced in cross section at 2a to throw out a portion of its flux into the adjacent space for creating a magnetic drag upon the non-magnetic drag disk, 7, which is shown carried on a spindle. 8, stepped in la jewel bearing. S), which is carried in a hollowed out portion of the shaft, -L An annular jewel bearing, 10, supports the upper end of the spindle to which is secured one end of a spiral biasing spring, 11, whose other end is fixed to a post, 12. 'The outer casing, 13, will preferably be composed of magnetic metal such as steelfor the purpose of .strengtheningthe magnetic eld in which the cylindrical skirt, 7a, of the drag disk, 7, hangs.

This mechanism is supported by a swinging arm, 14, formed of sheet metal, as indicated in Fi 3. com )risino' a horizontal portion, l-la, of inverted U-shaped cross section, one wall of which is extended to form the vertical portion, 14", carrying at its lower end the lug, l-lc. which pivotally engages the post, 15. The upper end of the post extends through the flat portion, 14,

of the U, and is formed with a head, 15a, to hold the arm,l 14, in position. Rivets, 16, secure the casing, 13, to the top of the arm, 14, nearits opposite end, while the flanged portions,ll4e, about the hub, 17, of the casing which serves as a journal bearing for the sha-ft, 4. The hub, 17, is provided with an aperture, 17a, registering with the open end of the U-shaped arm, 14, and ari-oil wick, 18, is housed in this arm extending into said aperture, 17a, being supported in position by a bottom wall, 19, held Yfrictionally between the flanges, 14e, and having its end bent up at 19a to form a closure for the wick housing. The top of the arm, 14, lis apertured at letf to permit renewa ofthe oil supply in the wick, 18.

-The post,l 15, is fixed upright in the mounting plate, 20, which is secured by two screws, 21, to the annular portion, F, of the metallic mounting of the phonograph mechanism, and the friction wheel, 5, is held against the periphery of the revolvingtable, B, by means of a spring, coiled about the post, 15, and having one end engage-d in the plate, 20, while its opposite end reacts against the vertical wall, Hb, of the arm,l&.

In the type of talking machine or phonograph illust ated, the revolving table, B, is

' substantiallyzhorizontal, as is the plane of derstood the drag disk,

revolution of the magnet, 2. As is well un- 7, is rotatably displaced from a normal position by an amount proportional to the speed of rotation of the ing. 1.

I claimz-fl. In a speed indicator comprisinga casing, a vertical shaft therein; a journal bearing for said shaftat the lower portionv of said casing, and a supporting arm secured to the casing and extending transversely of l said shaft, said journal bearing having an aperture and said arm being hollow with its bore connecting with said aperture, and an oil wick in said hollow arm extending into line to indicate the speed l said aperture, the arm having an aperture beyond the fasing to admit oil .to said wick.

2. In combination with a speed indigator, a support for the purpose indicated comprising a 'pivot post and an armof sheet metal having a' portion which extends parallel to said post-'with one edge bent at right angles to said portion and pivotally engaging the post, and with a lug bent, at right angles to said portion at its opposite edge also pivotally engaging said post, and means "securing the speed indicator casing to the said bent edge of the arm at the end oppon site the pivot post. v

3. In combination withl a speed indi lator,

va support` for ythe purpose indicated. ,com-

prising a pivot post and a bracket'of sheet metal comprising two'arins substantially at right angles to each other, onefot' said arms 5 being folded into cha'nnel form, one'side of the channel comprising the other arm, the remote end of said other arm being` bent to: form a lug parallel with `the web of said channel, said web and said lug being'pivotally engaged with the post,v and the"e1'id of said channel remote from the pi\otbe ing provided with means for secl'iringthef' speed-indicator casing thereto.

In testimony whereof, I have hereunto set 65 my hand at Chicago, Illinois, this'QJfth day of December, 191i. l

HENRY KooouniiiK.

Witnesses: v y

Ro'r. N. BURTON, E DNA M. MACINTOSH. 

